<template>
  <div id="app">
    <div>
      <div
        style="display: inline-block"
        v-for="(item, index) in arr"
        :key="index"
      >
        <input type="checkbox" v-model="newArr" :value="item" />
        <span>{{ item }}</span>
      </div>
      <p>你选中的元素, 累加的值和为: {{ total }}</p>
    </div>
  </div>
</template>

<script>
export default {
  name: "App",
  data() {
    return {
      arr: [9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
      newArr: [],
    };
  },
  computed: {
    total() {
      return this.newArr.reduce((t, c) => t + c, 0);
    },
  },
};
</script>

<style>
</style>